./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-85.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-85.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0269ef8e9a97039e55b7063c2b754c2dc0d4d1e8e94f452102270054dac0b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:40:45,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:40:46,016 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:40:46,020 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:40:46,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:40:46,042 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:40:46,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:40:46,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:40:46,043 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:40:46,044 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:40:46,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:40:46,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:40:46,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:40:46,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:40:46,047 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:40:46,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:40:46,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:40:46,048 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:40:46,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:40:46,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:40:46,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:40:46,051 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:40:46,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:40:46,052 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:40:46,052 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:40:46,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:40:46,052 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:40:46,053 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:40:46,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:40:46,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:40:46,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:40:46,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:40:46,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:40:46,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:40:46,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:40:46,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:40:46,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:40:46,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:40:46,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:40:46,056 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:40:46,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:40:46,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:40:46,057 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0269ef8e9a97039e55b7063c2b754c2dc0d4d1e8e94f452102270054dac0b8 [2023-11-29 00:40:46,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:40:46,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:40:46,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:40:46,280 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:40:46,280 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:40:46,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-85.i [2023-11-29 00:40:49,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:40:49,275 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:40:49,276 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-85.i [2023-11-29 00:40:49,292 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/data/329b15e11/8e09cdc13c0f4aa2ad2a51b77a3dcd4c/FLAGd301c01ce [2023-11-29 00:40:49,304 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/data/329b15e11/8e09cdc13c0f4aa2ad2a51b77a3dcd4c [2023-11-29 00:40:49,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:40:49,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:40:49,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:40:49,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:40:49,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:40:49,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728b3b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49, skipping insertion in model container [2023-11-29 00:40:49,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,373 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:40:49,495 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-85.i[916,929] [2023-11-29 00:40:49,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:40:49,693 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:40:49,706 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-85.i[916,929] [2023-11-29 00:40:49,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:40:49,814 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:40:49,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49 WrapperNode [2023-11-29 00:40:49,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:40:49,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:40:49,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:40:49,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:40:49,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,936 INFO L138 Inliner]: procedures = 26, calls = 113, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 888 [2023-11-29 00:40:49,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:40:49,937 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:40:49,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:40:49,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:40:49,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,956 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,984 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:40:49,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:49,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:50,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:50,015 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:50,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:50,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:50,038 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:40:50,039 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:40:50,039 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:40:50,039 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:40:50,040 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (1/1) ... [2023-11-29 00:40:50,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:40:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:50,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:40:50,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:40:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:40:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:40:50,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:40:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:40:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:40:50,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:40:50,231 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:40:50,233 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:40:51,166 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:40:51,228 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:40:51,228 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:40:51,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:40:51 BoogieIcfgContainer [2023-11-29 00:40:51,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:40:51,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:40:51,232 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:40:51,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:40:51,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:40:49" (1/3) ... [2023-11-29 00:40:51,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83078b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:40:51, skipping insertion in model container [2023-11-29 00:40:51,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:40:49" (2/3) ... [2023-11-29 00:40:51,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83078b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:40:51, skipping insertion in model container [2023-11-29 00:40:51,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:40:51" (3/3) ... [2023-11-29 00:40:51,238 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-85.i [2023-11-29 00:40:51,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:40:51,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:40:51,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:40:51,320 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@cbbd28b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:40:51,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:40:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 327 states, 224 states have (on average 1.7008928571428572) internal successors, (381), 225 states have internal predecessors, (381), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-29 00:40:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2023-11-29 00:40:51,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:51,368 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:51,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:51,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1849576068, now seen corresponding path program 1 times [2023-11-29 00:40:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:51,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271277214] [2023-11-29 00:40:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:51,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271277214] [2023-11-29 00:40:51,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:40:51,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943740239] [2023-11-29 00:40:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:51,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:51,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:51,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:51,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:40:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:52,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:40:52,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2023-11-29 00:40:52,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943740239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:52,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:52,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:40:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900128] [2023-11-29 00:40:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:52,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:40:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:40:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:40:52,386 INFO L87 Difference]: Start difference. First operand has 327 states, 224 states have (on average 1.7008928571428572) internal successors, (381), 225 states have internal predecessors, (381), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-29 00:40:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:52,482 INFO L93 Difference]: Finished difference Result 651 states and 1260 transitions. [2023-11-29 00:40:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:40:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 2 states have call successors, (100) Word has length 638 [2023-11-29 00:40:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:52,497 INFO L225 Difference]: With dead ends: 651 [2023-11-29 00:40:52,498 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 00:40:52,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:40:52,508 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:52,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 571 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:40:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 00:40:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-11-29 00:40:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 223 states have (on average 1.6771300448430493) internal successors, (374), 223 states have internal predecessors, (374), 100 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-29 00:40:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 574 transitions. [2023-11-29 00:40:52,628 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 574 transitions. Word has length 638 [2023-11-29 00:40:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:52,628 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 574 transitions. [2023-11-29 00:40:52,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-29 00:40:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 574 transitions. [2023-11-29 00:40:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2023-11-29 00:40:52,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:52,651 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:52,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:40:52,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:40:52,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:52,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1110007532, now seen corresponding path program 1 times [2023-11-29 00:40:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259108499] [2023-11-29 00:40:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:52,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365730811] [2023-11-29 00:40:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:52,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:52,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:52,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:40:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:53,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:40:53,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:40:54,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:54,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259108499] [2023-11-29 00:40:54,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365730811] [2023-11-29 00:40:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365730811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:54,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:40:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156633960] [2023-11-29 00:40:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:54,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:40:54,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:40:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:54,382 INFO L87 Difference]: Start difference. First operand 325 states and 574 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:54,477 INFO L93 Difference]: Finished difference Result 973 states and 1720 transitions. [2023-11-29 00:40:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:54,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 638 [2023-11-29 00:40:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:54,488 INFO L225 Difference]: With dead ends: 973 [2023-11-29 00:40:54,489 INFO L226 Difference]: Without dead ends: 649 [2023-11-29 00:40:54,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:54,492 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 262 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:54,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1131 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:40:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-11-29 00:40:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2023-11-29 00:40:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 444 states have (on average 1.6756756756756757) internal successors, (744), 444 states have internal predecessors, (744), 200 states have call successors, (200), 2 states have call predecessors, (200), 2 states have return successors, (200), 200 states have call predecessors, (200), 200 states have call successors, (200) [2023-11-29 00:40:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1144 transitions. [2023-11-29 00:40:54,631 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1144 transitions. Word has length 638 [2023-11-29 00:40:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:54,634 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 1144 transitions. [2023-11-29 00:40:54,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1144 transitions. [2023-11-29 00:40:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2023-11-29 00:40:54,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:54,643 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:54,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:40:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:54,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:54,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1841431056, now seen corresponding path program 1 times [2023-11-29 00:40:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:54,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315496320] [2023-11-29 00:40:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:54,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:54,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:54,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065796758] [2023-11-29 00:40:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:54,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:40:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:55,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:40:55,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:40:56,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:56,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:56,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315496320] [2023-11-29 00:40:56,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065796758] [2023-11-29 00:40:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065796758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:56,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:56,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:40:56,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380707463] [2023-11-29 00:40:56,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:56,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:40:56,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:40:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:56,138 INFO L87 Difference]: Start difference. First operand 647 states and 1144 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:56,581 INFO L93 Difference]: Finished difference Result 1485 states and 2628 transitions. [2023-11-29 00:40:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:40:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 639 [2023-11-29 00:40:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:56,591 INFO L225 Difference]: With dead ends: 1485 [2023-11-29 00:40:56,591 INFO L226 Difference]: Without dead ends: 839 [2023-11-29 00:40:56,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:56,595 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 625 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:56,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 1820 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:40:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-11-29 00:40:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 834. [2023-11-29 00:40:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 595 states have (on average 1.6991596638655462) internal successors, (1011), 596 states have internal predecessors, (1011), 235 states have call successors, (235), 3 states have call predecessors, (235), 3 states have return successors, (235), 234 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-29 00:40:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1481 transitions. [2023-11-29 00:40:56,761 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1481 transitions. Word has length 639 [2023-11-29 00:40:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:56,763 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1481 transitions. [2023-11-29 00:40:56,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1481 transitions. [2023-11-29 00:40:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2023-11-29 00:40:56,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:56,772 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:56,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:40:56,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:56,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:56,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1515817799, now seen corresponding path program 1 times [2023-11-29 00:40:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013903068] [2023-11-29 00:40:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:57,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:57,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694897560] [2023-11-29 00:40:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:57,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:57,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:40:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:57,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:40:57,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:40:57,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:57,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013903068] [2023-11-29 00:40:57,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:57,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694897560] [2023-11-29 00:40:57,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694897560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:57,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:40:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459271529] [2023-11-29 00:40:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:40:57,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:40:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:57,521 INFO L87 Difference]: Start difference. First operand 834 states and 1481 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:57,822 INFO L93 Difference]: Finished difference Result 1858 states and 3303 transitions. [2023-11-29 00:40:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:40:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 639 [2023-11-29 00:40:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:57,837 INFO L225 Difference]: With dead ends: 1858 [2023-11-29 00:40:57,837 INFO L226 Difference]: Without dead ends: 1534 [2023-11-29 00:40:57,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:40:57,840 INFO L413 NwaCegarLoop]: 1125 mSDtfsCounter, 1109 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:57,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1109 Valid, 2774 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:40:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2023-11-29 00:40:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1525. [2023-11-29 00:40:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1113 states have (on average 1.7178796046720575) internal successors, (1912), 1116 states have internal predecessors, (1912), 405 states have call successors, (405), 6 states have call predecessors, (405), 6 states have return successors, (405), 402 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 00:40:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2722 transitions. [2023-11-29 00:40:57,998 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2722 transitions. Word has length 639 [2023-11-29 00:40:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:58,000 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 2722 transitions. [2023-11-29 00:40:58,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2722 transitions. [2023-11-29 00:40:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2023-11-29 00:40:58,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:58,006 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:58,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:40:58,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:58,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:58,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash -965468573, now seen corresponding path program 1 times [2023-11-29 00:40:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:58,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478464741] [2023-11-29 00:40:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:58,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:58,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:58,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723117086] [2023-11-29 00:40:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:58,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:58,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:58,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:40:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:58,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:40:58,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:40:58,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:58,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478464741] [2023-11-29 00:40:58,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:58,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723117086] [2023-11-29 00:40:58,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723117086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:58,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:58,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:40:58,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980393600] [2023-11-29 00:40:58,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:40:58,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:58,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:40:58,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:58,777 INFO L87 Difference]: Start difference. First operand 1525 states and 2722 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:58,904 INFO L93 Difference]: Finished difference Result 4069 states and 7321 transitions. [2023-11-29 00:40:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 640 [2023-11-29 00:40:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:58,925 INFO L225 Difference]: With dead ends: 4069 [2023-11-29 00:40:58,925 INFO L226 Difference]: Without dead ends: 2545 [2023-11-29 00:40:58,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:58,932 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 335 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:58,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1161 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:40:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2023-11-29 00:40:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2537. [2023-11-29 00:40:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2029 states have (on average 1.7654016757023163) internal successors, (3582), 2038 states have internal predecessors, (3582), 495 states have call successors, (495), 12 states have call predecessors, (495), 12 states have return successors, (495), 486 states have call predecessors, (495), 495 states have call successors, (495) [2023-11-29 00:40:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 4572 transitions. [2023-11-29 00:40:59,178 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 4572 transitions. Word has length 640 [2023-11-29 00:40:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:59,179 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 4572 transitions. [2023-11-29 00:40:59,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:40:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 4572 transitions. [2023-11-29 00:40:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:40:59,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:59,206 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:59,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:40:59,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:59,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:59,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1505922191, now seen corresponding path program 1 times [2023-11-29 00:40:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:59,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956261870] [2023-11-29 00:40:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:59,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:40:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329476837] [2023-11-29 00:40:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:59,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:40:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:59,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:40:59,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:40:59,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:40:59,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:59,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956261870] [2023-11-29 00:40:59,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:40:59,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329476837] [2023-11-29 00:40:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329476837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:59,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:59,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:40:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823830137] [2023-11-29 00:40:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:59,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:40:59,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:40:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:59,969 INFO L87 Difference]: Start difference. First operand 2537 states and 4572 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:00,178 INFO L93 Difference]: Finished difference Result 6976 states and 12529 transitions. [2023-11-29 00:41:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:41:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 641 [2023-11-29 00:41:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:00,210 INFO L225 Difference]: With dead ends: 6976 [2023-11-29 00:41:00,210 INFO L226 Difference]: Without dead ends: 4440 [2023-11-29 00:41:00,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:00,218 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 357 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:00,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 1127 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:41:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2023-11-29 00:41:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 4435. [2023-11-29 00:41:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4435 states, 3507 states have (on average 1.742800114057599) internal successors, (6112), 3528 states have internal predecessors, (6112), 903 states have call successors, (903), 24 states have call predecessors, (903), 24 states have return successors, (903), 882 states have call predecessors, (903), 903 states have call successors, (903) [2023-11-29 00:41:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 7918 transitions. [2023-11-29 00:41:00,615 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 7918 transitions. Word has length 641 [2023-11-29 00:41:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:00,616 INFO L495 AbstractCegarLoop]: Abstraction has 4435 states and 7918 transitions. [2023-11-29 00:41:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 7918 transitions. [2023-11-29 00:41:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:41:00,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:00,628 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:00,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:41:00,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:00,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:00,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1719933683, now seen corresponding path program 1 times [2023-11-29 00:41:00,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:00,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129927186] [2023-11-29 00:41:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:00,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:00,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404464229] [2023-11-29 00:41:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:00,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:00,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:00,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:00,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:41:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:01,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:41:01,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:41:01,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:41:01,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:01,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129927186] [2023-11-29 00:41:01,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:01,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404464229] [2023-11-29 00:41:01,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404464229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:01,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:01,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:41:01,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624943150] [2023-11-29 00:41:01,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:01,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:41:01,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:01,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:41:01,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:01,321 INFO L87 Difference]: Start difference. First operand 4435 states and 7918 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:01,599 INFO L93 Difference]: Finished difference Result 11981 states and 21228 transitions. [2023-11-29 00:41:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:41:01,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 641 [2023-11-29 00:41:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:01,654 INFO L225 Difference]: With dead ends: 11981 [2023-11-29 00:41:01,654 INFO L226 Difference]: Without dead ends: 7547 [2023-11-29 00:41:01,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:01,669 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 380 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:01,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1332 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:41:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7547 states. [2023-11-29 00:41:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7547 to 7539. [2023-11-29 00:41:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7539 states, 5783 states have (on average 1.6956596922012797) internal successors, (9806), 5828 states have internal predecessors, (9806), 1707 states have call successors, (1707), 48 states have call predecessors, (1707), 48 states have return successors, (1707), 1662 states have call predecessors, (1707), 1707 states have call successors, (1707) [2023-11-29 00:41:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7539 states to 7539 states and 13220 transitions. [2023-11-29 00:41:02,214 INFO L78 Accepts]: Start accepts. Automaton has 7539 states and 13220 transitions. Word has length 641 [2023-11-29 00:41:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:02,215 INFO L495 AbstractCegarLoop]: Abstraction has 7539 states and 13220 transitions. [2023-11-29 00:41:02,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 7539 states and 13220 transitions. [2023-11-29 00:41:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:41:02,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:02,228 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:02,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:41:02,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:41:02,429 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:02,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash -872166901, now seen corresponding path program 1 times [2023-11-29 00:41:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399983731] [2023-11-29 00:41:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:02,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:02,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:02,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994495882] [2023-11-29 00:41:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:02,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:02,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:02,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:41:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:02,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:41:02,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:41:02,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:41:02,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399983731] [2023-11-29 00:41:02,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:02,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994495882] [2023-11-29 00:41:02,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994495882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:02,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:02,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:41:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791668832] [2023-11-29 00:41:02,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:02,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:41:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:41:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:02,945 INFO L87 Difference]: Start difference. First operand 7539 states and 13220 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:03,485 INFO L93 Difference]: Finished difference Result 21451 states and 37468 transitions. [2023-11-29 00:41:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:41:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 641 [2023-11-29 00:41:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:03,556 INFO L225 Difference]: With dead ends: 21451 [2023-11-29 00:41:03,557 INFO L226 Difference]: Without dead ends: 13913 [2023-11-29 00:41:03,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:03,577 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 310 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:03,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1125 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:41:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13913 states. [2023-11-29 00:41:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13913 to 13899. [2023-11-29 00:41:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13899 states, 10511 states have (on average 1.6658738464465799) internal successors, (17510), 10604 states have internal predecessors, (17510), 3291 states have call successors, (3291), 96 states have call predecessors, (3291), 96 states have return successors, (3291), 3198 states have call predecessors, (3291), 3291 states have call successors, (3291) [2023-11-29 00:41:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13899 states to 13899 states and 24092 transitions. [2023-11-29 00:41:04,421 INFO L78 Accepts]: Start accepts. Automaton has 13899 states and 24092 transitions. Word has length 641 [2023-11-29 00:41:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:04,422 INFO L495 AbstractCegarLoop]: Abstraction has 13899 states and 24092 transitions. [2023-11-29 00:41:04,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13899 states and 24092 transitions. [2023-11-29 00:41:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:41:04,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:04,444 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:04,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:41:04,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:04,646 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:04,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash 916208203, now seen corresponding path program 1 times [2023-11-29 00:41:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311911199] [2023-11-29 00:41:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:04,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:04,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298880922] [2023-11-29 00:41:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:04,747 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:04,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:41:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:05,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:41:05,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:41:05,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:41:05,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311911199] [2023-11-29 00:41:05,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298880922] [2023-11-29 00:41:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298880922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:05,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:05,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:41:05,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378403415] [2023-11-29 00:41:05,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:05,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:41:05,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:41:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:05,187 INFO L87 Difference]: Start difference. First operand 13899 states and 24092 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:05,934 INFO L93 Difference]: Finished difference Result 41695 states and 72274 transitions. [2023-11-29 00:41:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:41:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 641 [2023-11-29 00:41:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:05,995 INFO L225 Difference]: With dead ends: 41695 [2023-11-29 00:41:05,995 INFO L226 Difference]: Without dead ends: 27797 [2023-11-29 00:41:06,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:06,022 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 562 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:06,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1142 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:41:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27797 states. [2023-11-29 00:41:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27797 to 27795. [2023-11-29 00:41:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27795 states, 21020 states have (on average 1.656803044719315) internal successors, (34826), 21206 states have internal predecessors, (34826), 6582 states have call successors, (6582), 192 states have call predecessors, (6582), 192 states have return successors, (6582), 6396 states have call predecessors, (6582), 6582 states have call successors, (6582) [2023-11-29 00:41:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27795 states to 27795 states and 47990 transitions. [2023-11-29 00:41:07,955 INFO L78 Accepts]: Start accepts. Automaton has 27795 states and 47990 transitions. Word has length 641 [2023-11-29 00:41:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:07,955 INFO L495 AbstractCegarLoop]: Abstraction has 27795 states and 47990 transitions. [2023-11-29 00:41:07,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 27795 states and 47990 transitions. [2023-11-29 00:41:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:41:07,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:07,972 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:07,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:41:08,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:41:08,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:08,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1135062921, now seen corresponding path program 1 times [2023-11-29 00:41:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:08,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763932200] [2023-11-29 00:41:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:08,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:08,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480830374] [2023-11-29 00:41:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:08,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:08,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:08,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:41:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:08,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:41:08,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:41:09,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:41:09,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:09,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763932200] [2023-11-29 00:41:09,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:09,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480830374] [2023-11-29 00:41:09,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480830374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:09,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:41:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031172444] [2023-11-29 00:41:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:41:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:41:09,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:41:09,400 INFO L87 Difference]: Start difference. First operand 27795 states and 47990 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:13,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:41:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:15,030 INFO L93 Difference]: Finished difference Result 81963 states and 141281 transitions. [2023-11-29 00:41:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:41:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 641 [2023-11-29 00:41:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:15,156 INFO L225 Difference]: With dead ends: 81963 [2023-11-29 00:41:15,156 INFO L226 Difference]: Without dead ends: 54169 [2023-11-29 00:41:15,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:41:15,203 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 472 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:15,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1895 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 67 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 00:41:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54169 states. [2023-11-29 00:41:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54169 to 54081. [2023-11-29 00:41:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54081 states, 41252 states have (on average 1.6558227479879764) internal successors, (68306), 41624 states have internal predecessors, (68306), 12396 states have call successors, (12396), 432 states have call predecessors, (12396), 432 states have return successors, (12396), 12024 states have call predecessors, (12396), 12396 states have call successors, (12396) [2023-11-29 00:41:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54081 states to 54081 states and 93098 transitions. [2023-11-29 00:41:18,664 INFO L78 Accepts]: Start accepts. Automaton has 54081 states and 93098 transitions. Word has length 641 [2023-11-29 00:41:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:18,665 INFO L495 AbstractCegarLoop]: Abstraction has 54081 states and 93098 transitions. [2023-11-29 00:41:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 54081 states and 93098 transitions. [2023-11-29 00:41:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:41:18,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:18,691 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:18,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:41:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:18,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:18,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash -779986987, now seen corresponding path program 1 times [2023-11-29 00:41:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582018827] [2023-11-29 00:41:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:18,963 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:18,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065325805] [2023-11-29 00:41:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:18,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:18,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:18,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:18,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:41:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:19,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:41:19,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:41:19,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:41:19,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:19,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582018827] [2023-11-29 00:41:19,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:19,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065325805] [2023-11-29 00:41:19,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065325805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:41:19,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:41:19,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:41:19,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453874633] [2023-11-29 00:41:19,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:41:19,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:41:19,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:41:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:19,450 INFO L87 Difference]: Start difference. First operand 54081 states and 93098 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:22,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:22,661 INFO L93 Difference]: Finished difference Result 155683 states and 266766 transitions. [2023-11-29 00:41:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:41:22,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) Word has length 641 [2023-11-29 00:41:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:22,902 INFO L225 Difference]: With dead ends: 155683 [2023-11-29 00:41:22,902 INFO L226 Difference]: Without dead ends: 101603 [2023-11-29 00:41:22,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:41:22,988 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 532 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:22,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1516 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:41:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101603 states. [2023-11-29 00:41:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101603 to 101601. [2023-11-29 00:41:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101601 states, 75944 states have (on average 1.6296744969977879) internal successors, (123764), 76688 states have internal predecessors, (123764), 24792 states have call successors, (24792), 864 states have call predecessors, (24792), 864 states have return successors, (24792), 24048 states have call predecessors, (24792), 24792 states have call successors, (24792) [2023-11-29 00:41:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101601 states to 101601 states and 173348 transitions. [2023-11-29 00:41:30,221 INFO L78 Accepts]: Start accepts. Automaton has 101601 states and 173348 transitions. Word has length 641 [2023-11-29 00:41:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:41:30,222 INFO L495 AbstractCegarLoop]: Abstraction has 101601 states and 173348 transitions. [2023-11-29 00:41:30,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100) [2023-11-29 00:41:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 101601 states and 173348 transitions. [2023-11-29 00:41:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:41:30,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:41:30,258 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:30,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:41:30,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:30,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:41:30,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1025451347, now seen corresponding path program 1 times [2023-11-29 00:41:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:30,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139395542] [2023-11-29 00:41:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:30,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:30,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:41:30,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195586269] [2023-11-29 00:41:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:30,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:30,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:30,536 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:30,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:41:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:30,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:41:30,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 5709 proven. 246 refuted. 0 times theorem prover too weak. 13845 trivial. 0 not checked. [2023-11-29 00:41:32,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 51 proven. 246 refuted. 0 times theorem prover too weak. 19503 trivial. 0 not checked. [2023-11-29 00:41:33,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139395542] [2023-11-29 00:41:33,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:41:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195586269] [2023-11-29 00:41:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195586269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:33,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:41:33,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 00:41:33,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640077489] [2023-11-29 00:41:33,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:41:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:41:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:41:33,110 INFO L87 Difference]: Start difference. First operand 101601 states and 173348 transitions. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 4 states have call successors, (200), 3 states have call predecessors, (200), 5 states have return successors, (200), 4 states have call predecessors, (200), 4 states have call successors, (200) [2023-11-29 00:41:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:41:55,384 INFO L93 Difference]: Finished difference Result 627263 states and 1054419 transitions. [2023-11-29 00:41:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:41:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 4 states have call successors, (200), 3 states have call predecessors, (200), 5 states have return successors, (200), 4 states have call predecessors, (200), 4 states have call successors, (200) Word has length 641 [2023-11-29 00:41:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:41:56,834 INFO L225 Difference]: With dead ends: 627263 [2023-11-29 00:41:56,834 INFO L226 Difference]: Without dead ends: 525663 [2023-11-29 00:41:57,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:41:57,261 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 2052 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:41:57,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2168 Valid, 2946 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:41:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525663 states. [2023-11-29 00:42:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525663 to 389325. [2023-11-29 00:42:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389325 states, 298844 states have (on average 1.6074741336617098) internal successors, (480384), 302636 states have internal predecessors, (480384), 86448 states have call successors, (86448), 4032 states have call predecessors, (86448), 4032 states have return successors, (86448), 82656 states have call predecessors, (86448), 86448 states have call successors, (86448) [2023-11-29 00:42:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389325 states to 389325 states and 653280 transitions. [2023-11-29 00:42:26,023 INFO L78 Accepts]: Start accepts. Automaton has 389325 states and 653280 transitions. Word has length 641 [2023-11-29 00:42:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:26,024 INFO L495 AbstractCegarLoop]: Abstraction has 389325 states and 653280 transitions. [2023-11-29 00:42:26,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 4 states have call successors, (200), 3 states have call predecessors, (200), 5 states have return successors, (200), 4 states have call predecessors, (200), 4 states have call successors, (200) [2023-11-29 00:42:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 389325 states and 653280 transitions. [2023-11-29 00:42:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:42:26,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:26,122 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:26,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:42:26,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:26,323 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:26,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1944659755, now seen corresponding path program 1 times [2023-11-29 00:42:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:26,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272283797] [2023-11-29 00:42:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:26,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:26,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:26,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237232345] [2023-11-29 00:42:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:26,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:26,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:42:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:26,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:42:26,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 8019 proven. 81 refuted. 0 times theorem prover too weak. 11700 trivial. 0 not checked. [2023-11-29 00:42:27,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 216 proven. 81 refuted. 0 times theorem prover too weak. 19503 trivial. 0 not checked. [2023-11-29 00:42:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272283797] [2023-11-29 00:42:27,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:27,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237232345] [2023-11-29 00:42:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237232345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:27,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:42:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:42:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679769288] [2023-11-29 00:42:27,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:42:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:42:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:42:27,499 INFO L87 Difference]: Start difference. First operand 389325 states and 653280 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-29 00:42:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:40,052 INFO L93 Difference]: Finished difference Result 630185 states and 1063455 transitions. [2023-11-29 00:42:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:42:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) Word has length 641 [2023-11-29 00:42:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:40,682 INFO L225 Difference]: With dead ends: 630185 [2023-11-29 00:42:40,682 INFO L226 Difference]: Without dead ends: 240861 [2023-11-29 00:42:41,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1284 GetRequests, 1274 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:42:41,189 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 382 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:41,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1169 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:42:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240861 states. [2023-11-29 00:42:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240861 to 215073. [2023-11-29 00:42:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215073 states, 169040 states have (on average 1.6275911026975864) internal successors, (275128), 170912 states have internal predecessors, (275128), 43920 states have call successors, (43920), 2112 states have call predecessors, (43920), 2112 states have return successors, (43920), 42048 states have call predecessors, (43920), 43920 states have call successors, (43920) [2023-11-29 00:42:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215073 states to 215073 states and 362968 transitions. [2023-11-29 00:42:55,858 INFO L78 Accepts]: Start accepts. Automaton has 215073 states and 362968 transitions. Word has length 641 [2023-11-29 00:42:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:55,859 INFO L495 AbstractCegarLoop]: Abstraction has 215073 states and 362968 transitions. [2023-11-29 00:42:55,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-29 00:42:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 215073 states and 362968 transitions. [2023-11-29 00:42:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:42:55,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:55,911 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:55,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:42:56,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:56,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:56,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash -875548333, now seen corresponding path program 1 times [2023-11-29 00:42:56,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:56,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754005309] [2023-11-29 00:42:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:56,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:42:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125570447] [2023-11-29 00:42:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:56,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:56,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:56,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:42:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:56,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:42:56,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 9993 proven. 144 refuted. 0 times theorem prover too weak. 9663 trivial. 0 not checked. [2023-11-29 00:42:57,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 153 proven. 144 refuted. 0 times theorem prover too weak. 19503 trivial. 0 not checked. [2023-11-29 00:42:57,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:57,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754005309] [2023-11-29 00:42:57,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:42:57,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125570447] [2023-11-29 00:42:57,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125570447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:57,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:42:57,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 00:42:57,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360473099] [2023-11-29 00:42:57,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:57,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:42:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:42:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:42:57,346 INFO L87 Difference]: Start difference. First operand 215073 states and 362968 transitions. Second operand has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 3 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (149), 3 states have call predecessors, (149), 3 states have call successors, (149) [2023-11-29 00:43:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:43:27,925 INFO L93 Difference]: Finished difference Result 755397 states and 1239793 transitions. [2023-11-29 00:43:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:43:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 3 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (149), 3 states have call predecessors, (149), 3 states have call successors, (149) Word has length 641 [2023-11-29 00:43:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:43:29,157 INFO L225 Difference]: With dead ends: 755397 [2023-11-29 00:43:29,157 INFO L226 Difference]: Without dead ends: 540325 [2023-11-29 00:43:29,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:43:29,716 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 683 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:43:29,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 2017 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:43:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540325 states. [2023-11-29 00:43:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540325 to 380817. [2023-11-29 00:43:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380817 states, 293408 states have (on average 1.5807339949830952) internal successors, (463800), 297200 states have internal predecessors, (463800), 83088 states have call successors, (83088), 4320 states have call predecessors, (83088), 4320 states have return successors, (83088), 79296 states have call predecessors, (83088), 83088 states have call successors, (83088) [2023-11-29 00:44:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380817 states to 380817 states and 629976 transitions. [2023-11-29 00:44:01,329 INFO L78 Accepts]: Start accepts. Automaton has 380817 states and 629976 transitions. Word has length 641 [2023-11-29 00:44:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:01,331 INFO L495 AbstractCegarLoop]: Abstraction has 380817 states and 629976 transitions. [2023-11-29 00:44:01,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 3 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (149), 3 states have call predecessors, (149), 3 states have call successors, (149) [2023-11-29 00:44:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 380817 states and 629976 transitions. [2023-11-29 00:44:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-11-29 00:44:01,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:01,442 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:01,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:44:01,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:44:01,643 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:01,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash 153810965, now seen corresponding path program 1 times [2023-11-29 00:44:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:01,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997933831] [2023-11-29 00:44:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:01,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:44:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008241037] [2023-11-29 00:44:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:01,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:01,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:01,711 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:01,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34f9d50e-6fb6-4d58-9e37-145933ee4953/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:44:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:02,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:44:02,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19800 trivial. 0 not checked. [2023-11-29 00:44:02,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:44:02,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997933831] [2023-11-29 00:44:02,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:44:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008241037] [2023-11-29 00:44:02,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008241037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:44:02,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:44:02,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:44:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653375872] [2023-11-29 00:44:02,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:44:02,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:44:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:44:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:44:02,280 INFO L87 Difference]: Start difference. First operand 380817 states and 629976 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 1 states have call successors, (100), 1 states have call predecessors, (100), 1 states have return successors, (100), 1 states have call predecessors, (100), 1 states have call successors, (100)